Nouns denoting natural phenomena
- northeaster
- a storm blowing from the northeast
- aerosol
- a cloud of solid or liquid particles in a gas
- snow mist
- small crystals of ice
- medium wave
- a radio wave with a wavelength between 100 and 1000 meters (a frequency between 300 kilohertz and 3000 kilohertz)
- magnetic line of force
- a line of force in a magnetic field
- beta rhythm
- the normal brainwave in the encephalogram of a person who is awake and alert; occurs with a frequency between 12 and 30 hertz
- infrared emission
- electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves
- optical phenomenon
- a physical phenomenon related to or involving light
- daylight
- light during the daytime
- fireball
- an especially luminous meteor (sometimes exploding)
- specific heat
- the heat required to raise the temperature of one gram of a substance one degree centigrade
- polymorphism
- (biology) the existence of two or more forms of individuals within the same animal species (independent of sex differences)
- downdraft
- a strong downward air current
- drizzle
- very light rain; stronger than mist but less than a shower
- beat
- a single pulsation of an oscillation produced by adding two waves of different frequencies; has a frequency equal to the difference between the two oscillations
- hail
- precipitation of ice pellets when there are strong rising air currents
- infrared ray
- a ray of infrared radiation; produces a thermal effect (as from an infrared lamp)
- light air
- wind moving 1-3 knots; 1 on the Beaufort scale
- moment
- a turning force produced by an object acting at a distance (or a measure of that force)
- neutron radiation
- radiation of neutrons (as by a neutron bomb)
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